>> there are these brand-new laws which are presented as a way to prevent voter fraud but are, in fact, designed to make it hard for specific people to vote. black people, elderly people, poor people and students. hmm, i wonder what those demographics have in common? oh, yeah. they're probably going to vote for this guy. >> the fight against voter i.d. laws has been a hot topic, so obviously it addresses that. sarah silverman, not a megastar, but somebody who does sort of get that youth interest. why do you think that ad was so popular? >> people love sarah, and if you saw the whole ad, it was something you wouldn't play on tv. >> exactly. that's the part we could play. >> it was a lot saltier than tv would allow us. she's been political along the way. she tried to get old jewish people to vote in florida the last election, and she's had a very funny, very clear voice.